Chucking device for rollers.



L. P. EVERROAD. CHUCKING DEVICE FOR ROLLERS. APPLICATION FILED JUNE 24. I916.

1,215,785. Patented Feb. 13, 1917.

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LENNIOUS EVERROAD; O35 GOLUMB'US, INDIANA, ASSIGNOB. TO REEVES PULLEY COMPANY, OF COLUMBUS, INDIANA, A CORPORATION OF INDIANA.

OHUCKING DEVICE FOR ROLLERS.

Specification of Letters Patent.

Patented Feb. 13, 1917.

Application filed June 2 1, 1916. Serial No. 105,611.

To all whom it may concern:

Be it known that I, LENNIOUS P. EVER ROAD, a citizen of the United States, residing at Columbus, in the county of Bartholomew and State of Indiana, have invented a new and useful Chucking Device for R011- ers, of which the following is a specification.

It is the object of my invention to chuck a tubular roller for driving it,-so that it can be finished on its entire outer surface. without necessitating any waste of material; and to do so in such a way that the roller is'held true when rotating. i

The accompanying drawing illustrates my invention. The single figure of such drawing is an elevation of my improved chucking arrangement, showing the live center partly in section, and also showing in section a roller in position for working.

The tubular roller 10 is cut off in the desired length from standard tubing, and is supported between a live cone center 11 and a dead cone center 12 so that it is held true and its exterior surface may be worked on effectively when the roller is rotated upon its axis. The live center 11 is suitably driven, and the dead center 12 is stationary and longitudinally adjustable, in the customary manner. The two centers 11 and 12 are preferably slightly smaller in diameter than is the roller 10, so that they will not be in the way of tools, such as grinding wheels, which are used on the roller.

In order that the live center 11 may drive the roller 10, the live center is provided with a square or otherwise non-circular hole 13 extending into it axially from its apex, and in this square hole 13 loosely fits a correspondingly shaped shank 14: of a driving member 15 located within the roller 10 and provided with a tapered screw thread 16. A wire helix 17 is loosely mounted in this screw thread 16. This helix 17 is normally of such size that it can he slid into and out of the roller 10 by slight pressure, and is preferably of uniform size so that all its turns bear lightly against the inner surface of such roller.

When the roller 10 has been placed over the driving member 15 and wire helix 17 and mounted between the live and dead cen ters 11 and 12, the live center 11 and the roller 10 are relatively rotated in the proper direction so that the driving member 15 is screwed into the helix 17, the friction of such helix with the interior of the roller 10 holding such helix from turning with the driving member. As the driving member 15 is thus screwed intothe helix 17, the tapered screw thread 16 expands such helix and forces its first turn (at the large end of the tapered screw thread) outward against the inner surface of the roller 10, so as to produce an interlocking binding. Usually this interlocking binding is produced by starting this live center rotating and manually holding back the roller. By now continuing the rotation of the live cen ter 11 in the same direction asthat which produced this interlocking binding, the roller 10 is rotated also and the exterior surface of such roller may be ground or otherwise worked on to produce. the desired finished surface. During this working, the roller 10 is held true by the live and dead centers 11 and 12, which support it, but is driven from the live center through the driving member 15 and wire helix 17.

When the exterior surface of the roller 10 has been finished as desired, the rotation of the live center 11 is stopped. and such live center and the roller 10 are rotated relatively in the reverse direction. The fric tion of the interior surface of the roller 10 carries the wire helix 17 with it so as to unscrew the driving member 15 out of such helix and thereby unbind the roller 10 from such driving member and helix. Upon such unbinding, the driving member with its helix may be forced out of the roller and placed in another roller for working the latter.

I claim as my invention:

1. In combination, a live center, a dead center, a driving member drivingly connected with said live center and axially slidable relatively thereto, said driving member having thereon a tapered screw thread, and a wire helix of normally uniform size mounted in said screw thread for engaging the inner surface of a tubular roller mounted on said live and dead centers.

2. In combination. a live center, a dead center, a driving member drivingly connected with said live center, said driving member having thereon a tapered screw thread, and a wire helix of normally uniform size mounted in said screw thread. for engaging the inner surface of a tubular roller mounted on said live and dead centers.

3. In combination, a live center, a dead center, a driving member drivingly connected with said live center and axially slidable relatively thereto, said driving member having thereon a tapered screw thread and a wire heliX mountedin said screw thread for engaging the inner surface of a tubular roller mounted on said live and dead centers.

4. In combination, a live center, a dead center, 'adriving member drivingly connected with said live center, said driving member having thereon a tapered screw thread, and a wire helix mounted in said screw thread for engaging the inner surface of a tubular roller mounted on said live and dead centers.

5. In combination, a live center, a dead center, said live center having a non-circular hole in its end, a driving member having a shank slidably fitting in the hole in said live center and being'provided with an eX- terior tapered screw thread, and a wire helix of normally uniform size mounted in said tapered thread for engaging the inner surface of a tubular roller mounted on said live and dead centers.

6. In combination, a live center, a dead center, said live center having a non-circular hole. in itsend, a driving member having shank slidably fitting in the hole in said live center and beingprovided with an exterior tapered screw thread, and a wire helix mounted in said tapered screw thread for engaging the inner surfaceof a tubular roller mounted on said live and dead centers.

.7. A. chucking device for tubular rollers, comprising a driving member having an external tapered screw thread thereon and being provided with a non-circular shank for slidably fitting in a correspondingly shaped hole in a live center, and a Wire helix of normally uniform size mounted in said tapered screw thread for engaging the inner surface of a tubular roller.

8. A chucking device for tubular rollers, comprising a driving member having an external tapered screw thread thereon and being provided with a non-circular shank for slidably fitting in a correspondingly shaped hole in a live center, and a wire helix mounted in said tapered screw thread for engaging the inner surface of a tubular roller.

In witness whereof, I have hereunto set my hand at Columbus, Indiana, this seventeenth day of June, A. D. one thousand nine hundred and sixteen.

LEN NIOUS P. EVERROAD.

Copies of this patent may be obtained for five cents each, by addressing the Commissionerof Patents, Washington, D. G. 

